JPS6463915A - Objective lens for microscope - Google Patents

Objective lens for microscope

Info

Publication number
JPS6463915A
JPS6463915A JP62220928A JP22092887A JPS6463915A JP S6463915 A JPS6463915 A JP S6463915A JP 62220928 A JP62220928 A JP 62220928A JP 22092887 A JP22092887 A JP 22092887A JP S6463915 A JPS6463915 A JP S6463915A
Authority
JP
Japan
Prior art keywords
group
lens
biconcave
biconvex
refracting power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62220928A
Other languages
Japanese (ja)
Other versions
JPH0823628B2 (en
Inventor
Yutaka Suenaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikon Corp
Original Assignee
Nikon Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nikon Corp filed Critical Nikon Corp
Priority to JP22092887A priority Critical patent/JPH0823628B2/en
Publication of JPS6463915A publication Critical patent/JPS6463915A/en
Publication of JPH0823628B2 publication Critical patent/JPH0823628B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Lenses (AREA)

Abstract

PURPOSE:To compensate distortion excellently by specifying the relations among the refractive indexes, center thickness, radii of curvature, and Abbe numbers of lenses in a 4th group, and the composite focal length of the whole system. CONSTITUTION:This lens consists of a 1st group L1 composed of a positive meniscus lens having its convex surface on an object side, a 2nd group L2 with positive refracting power, a 3rd group L3 which consists of a cemented lens of a biconvex lens and a biconcave lens and has negative refracting power on the whole, and a 4th group L4 which consists of a cemented lens of a biconcave and a biconvex lens and has positive refracting power. Then inequalities I-IV hold, where nn is the refractive index of the biconcave lens in the 4th group, np the refractive index of the biconvex lens in the 4th group, Dp the center thickness of the biconvex lens in the 3rd group, Ra the radius of curvature of the object-side lens surface of the biconvex lens in the 3rd group, Dn the center thickness of the biconcave lens in the 3rd group, upsilon the Abbe number of the biconcave lens in the 3rd group to a (d) line (lambda=587.6nm), and (f) the composite focal length of the whole system. Consequently, the distortion can be compensated excellently.
JP22092887A 1987-09-03 1987-09-03 Objective lens for microscope Expired - Lifetime JPH0823628B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22092887A JPH0823628B2 (en) 1987-09-03 1987-09-03 Objective lens for microscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22092887A JPH0823628B2 (en) 1987-09-03 1987-09-03 Objective lens for microscope

Publications (2)

Publication Number Publication Date
JPS6463915A true JPS6463915A (en) 1989-03-09
JPH0823628B2 JPH0823628B2 (en) 1996-03-06

Family

ID=16758750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22092887A Expired - Lifetime JPH0823628B2 (en) 1987-09-03 1987-09-03 Objective lens for microscope

Country Status (1)

Country Link
JP (1) JPH0823628B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075285A (en) * 1987-09-17 1991-12-24 Kernforschungszentrum Karlsruhe Gmbh Silver alloy sheathing material for ceramic superconducting wires
US5235465A (en) * 1990-04-24 1993-08-10 Dainippon Screen Mfg. Co., Ltd. Objective lens system for use within microscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075285A (en) * 1987-09-17 1991-12-24 Kernforschungszentrum Karlsruhe Gmbh Silver alloy sheathing material for ceramic superconducting wires
US5235465A (en) * 1990-04-24 1993-08-10 Dainippon Screen Mfg. Co., Ltd. Objective lens system for use within microscope

Also Published As

Publication number Publication date
JPH0823628B2 (en) 1996-03-06

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